java - how to find the difference in dates stored in 2 columns of mysql of same row - 


    dtchkt=obj.next();     string ddf;     rs=st.executequery("select datediff(dtchkt,dtchki) id="+id);     while(rs.next())     {            ddf=rs.getstring(1);         system.out.println(ddf);             }

the above code not working finding difference between dates of 2 columns want code return no of days between 2 specified dates of column.please suggest possible solution. 

rs=st.executequery("select datediff(dtchkt,dtchki) `table_name` id="+id);

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